CN105988138A - Faintly acid solution leakage sensing device - Google Patents
Faintly acid solution leakage sensing device Download PDFInfo
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- CN105988138A CN105988138A CN201510041896.2A CN201510041896A CN105988138A CN 105988138 A CN105988138 A CN 105988138A CN 201510041896 A CN201510041896 A CN 201510041896A CN 105988138 A CN105988138 A CN 105988138A
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- acidic solution
- weakly acidic
- conductor wire
- sensing device
- leakage sensing
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Abstract
The invention relates to a faintly acidic solution leakage sensing device, and particularly provides a faintly acidic solution leakage sensing device for detecting the leakage of faintly acidic solutions, such as citric acid, formic acid, acetic acid and the like, and the types of leaked solutions. The faintly acidic solution leakage sensing device comprises a band-based film layer made of film materials, an electric lead formed on the upper surface of the band-based film layer along the length direction, and a coating layer used for covering the electric lead and capable of being dissolved or eroded in a faintly acidic solution. Counted in weight percentage, 2-30% of a graphene dispersion solution, 35-60% of cationic polystyrene and 35-60% of cationic polyurethane are mixed up and coated to form the coating layer. The faintly acidic solution leakage sensing device can be easily mounted in a pipeline, and is low in manufacturing cost and strong in price competitiveness. In addition, the device can make an alarm sound according to the types of faintly acidic solutions. Therefore, the device can quickly and accurately take corresponding measures for various leaked solutions.
Description
Technical field
The present invention relates to a kind of weakly acidic solution leakage sensing device, the weakly acidic solution leakage sensing device of particularly a kind of leakage for sensing the faintly acid chemical solutions such as citric acid, formic acid, acetic acid and leakage solution type.
Background technology
The applicant has applied for multinomial relevant banding leakage sensor patent, and obtains mandate (patent No.: 10-0909242,100827385).Described banding leakage sensor may be disposed at the place easily leaking and leaks for sensing.
As depicted in figs. 1 and 2, described leakage sensor 100 includes from the bottom to top lower adhesion layer the 120th, basal film layer 110 and the upper protective film layer 130 that lamination is arranged successively.
Described lower adhesion layer 120, in viscose glue banding, sticks to the position leaking；Described basal film layer 110 above is formed with conductor wire the 111st, 112, and in order to enable to form conductor wire the 111st, 112 with mode of printing, described basal film layer 110 is made up of the film of PET, PE, PTFE, PVC or other polytetrafluoroethylene (PTFE) series material.
The upper surface of described basal film layer 110 is provided with in banding, in a certain distance apart from one another, the conductor wire that be arranged in parallel along its length the 111st, 112.The 111st, described conductor wire 112 is formed by electrically conductive ink or silver (Silver) compound printing.
Described upper protective film layer 130 lamination is arranged above basal film layer 110, is used for protecting conductor wire the 111st, 112 to protect it from external damage.Described upper protective film layer 130 is also made up of PET, PE, PTFE, PVC or other polytetrafluoroethylene (PTFE) series material such as basal film layer, and is being provided with sensing bore 131 in a certain distance apart from one another with conductor wire the 111st, 112 corresponding positions.
Therefore, when there is drainage, the water spilling is flowed into by the sensing bore 131 at the place of leaking, and makes two conductor wires be energized under the effect of water.Now, remote controllers are according to its "on" position, i.e. whether the state sensing forming Guan Bi circuit leaks, and sends associated alarm.
But, this film-type leakage sensor 100 can detect that the leakage of conductive solution because having electric conductivity, however, it is very difficult to detect weakly acidic solution selectively.
Content of the invention
It is an object of the invention to make up the deficiencies in the prior art, provide a kind of on conductor wire coating be dissolved only in weakly acidic solution and water-fast coat, in order to detect the weakly acidic solution leakage sensing device of weakly acidic solution selectively.
It is a further object of the present invention to provide a kind of based on the upper and lower resistance limit value of basic resistance value setting, and by measuring the time that resistance value changes in the range of resistance limit value, identify the weakly acidic solution leakage sensing device of the solution type of leakage.
To achieve these goals, this invention takes following technical scheme:
Conductor wire that the weakly acidic solution leakage sensing device of the present invention by the basal film layer of film material, is formed along its length at the upper surface of described basal film layer and for covering described conductor wire and can dissolve or the coat that corrodes in weakly acidic solution is constituted, described coat is mixed by 2～30 percentage by weight graphene dispersing solutions, 35～60 percentage by weight cation polystyrenes and 35～60 percentage by weight cation polyurethane phases and is coated and forms.
Conductor wire that weakly acidic solution of the present invention leakage sensing device by the basal film layer of film material, is formed along its length at the upper surface of described basal film layer and for covering described conductor wire and can dissolve or the coat that corrodes in weakly acidic solution is constituted, the mixture that described coat is dissolved or corroded by 50～98 percentage by weights the resin material in weak acid, 1～50 percentage by weight volatile solvent and 1～10 percentage by weight curing agent is formed.
Described resin material is made up of any one in polyurethane (PU), polyformaldehyde (POM), polymethyl methacrylate (PMMA), Merlon (PC), polyamide (PA), ionomer, polyarylate, polyester elastomer (PEE), phenolic resin (PF) or polymer composite.
Described volatile solvent is solvent series solvent.
Described curing agent is isocyanates or melamine.
Conductor wire that the weakly acidic solution leakage sensing device of the present invention by the basal film layer of film material, is formed along its length at the upper surface of described basal film layer and for covering described conductor wire and can dissolve or the coat that corrodes in weakly acidic solution constitutes weakly acidic solution sensor, being connected with controller on described weakly acidic solution sensor, described controller is for generating alarm according to the resistance value changing in time while conductor wire supplies remote sensing power supply.
The weakly acidic solution leakage sensing device conductor wire that by the basal film layer of film material, is separated by setting on described basal film layer side by side of the present invention and be coated on the clad outside described conductor wire with the material dissolved or corrode in weakly acidic solution and constituted weakly acidic solution sensor, being connected with controller on described weakly acidic solution sensor, described controller is for generating alarm according to the resistance value changing in time while described conductor wire supplies remote sensing power supply.
It is set with the reference resistor value of described weakly acidic solution sensor in described controller, described reference resistor value "+" direction and "-" direction setting have upper limit resistance value and the lower resistance value of alarm set value.
Described conductor wire is made up of the first conductor wire and second conductor wire of pair of parellel, described first conductor wire is made up of activated carbon or carbon black or CNT or Graphene compound or silver compound or sheet metal or other electric conductors, and described second conductor wire is by activated carbon or carbon black or CNT or Graphene compound.
Described conductor wire is by the upper surface formation adhesive agent at basal film layer, and sprays conductive powder on described adhesive agent and formed.
Described conductor wire is formed by spraying coating process.
The weakly acidic solution leakage sensing device of the present invention utilizes the material dissolving or corroding in weakly acidic solution to form coat the above of conductor wire, makes two conductor wires only be energized under the effect of weakly acidic solution, thus can accurately sense faintly acid composition；Further, described conductor wire is due in banding, therefore, is not only easy to be arranged on pipeline etc., and low cost of manufacture, there is stronger price competitiveness.
Additionally, the present invention also can sound the alarm according to weakly acidic solution species, therefore, quickly and accurately corresponding measure can be taked to various leakage solution.
Brief description
Fig. 1 is the STRUCTURE DECOMPOSITION schematic diagram of existing leakage sensor.
Fig. 2 is the combination sectional drawing of existing leakage sensor.
Fig. 3 is weakly acidic solution of the present invention leakage sensing device decomposition texture schematic diagram.
Fig. 4 is the combination sectional drawing of weakly acidic solution of the present invention leakage sensing device.
Structural representation when Fig. 5 a is to be connected with controller in weakly acidic solution of the present invention leakage sensing device.
Electrical block diagram when Fig. 5 b is to be connected with controller in weakly acidic solution of the present invention leakage sensing device.
Fig. 6 is that controller sends the state diagram of alarm according to the resistance value changing with the weakly acidic solution species of leakage.
Fig. 7 is the another embodiment structural representation of weakly acidic solution sensor of the present invention.
Fig. 8 and Fig. 9 is that the conductor wire of weakly acidic solution sensor of the present invention forms schematic diagram.
In figure: the 210th, basal film layer；211st, the 212nd, conductor wire；220th, lower adhesion layer；230th, upper protective film layer；231st, sensing bore；240th, coat；300th, controller；400th, top connector；500th, terminator terminating junctor.
Detailed description of the invention
The present invention is described in detail below in conjunction with the accompanying drawings.
The basic structure of weakly acidic solution sensor 200 of the present invention is identical with the structure shown in Fig. 1 and Fig. 2.The weakly acidic solution sensing device of the present invention includes from the bottom to top lower adhesion layer the 220th, basal film layer the 210th, coat 240 and the upper protective film layer 230 that lamination successively arranges, and described basal film layer 210 is formed conductor wire the 211st, 212.At this mainly to as shown in Fig. 3, Fig. 4 for cover basal film layer 210 and conductor wire the 211st, 212 the composition material of coat 240 illustrate.
It is known that the weakly acidic solutions such as citric acid, formic acid, acetic acid have electric conductivity, the 211st, the conductor wire utilizing conductive ink or silver compound to print 212 does not dissolves in weakly acidic solution.
Described coat 240 is mixed by 2～30 percentage by weight Graphene (graphene) dispersion liquids, 35～60 percentage by weight cation polystyrenes and 35～60 percentage by weight cation polyurethane phases, so that it is water insoluble and be dissolved only in weakly acidic solution.
Graphene is the one of carbon allotrope, and its pyroconductivity or conductivity are very high, and, react on acidulous material and make resistance value change.
Cation polystyrene has reaction and is dissolved in the character of acidulous material.
The purpose using cation polyurethane is in order to waterproof, owing to described cationic polyurethane resin is water insoluble, therefore can stop current direction conductor wire the 211st, 212, thus prevent the irregular operating being caused by water, and make coating liquid easily be attached to basal film layer 210.
The coating liquid of described mixing is coated on the upper surface of basal film layer 210 in order to cover conductor wire the 211st, 212 with 2～20 thickness.
When there is when sewing of weakly acidic solution, weakly acidic solution is flowed into by the sensing bore 131 sewing place and makes coat 240 dissolve, makes the resistance value of graphene dispersing solution change.
Under the effect of the described coat 240 changing based on weakly acidic solution resistance value and dissolving, conductor wire the 111st, 112 energising.Remote controllers receive the resistance change under "on" position and determine whether sewing of weakly acidic solution.
The mixture that the coat 240 of another embodiment of the present invention is dissolved or corroded by 50～98 percentage by weights the resin in weak acid solution, 1～50 percentage by weight volatile solvent, 1～10 percentage by weight curing agent mix, is formed by bar type coating (Bar coating), the slit coating mode such as (slot die), intaglio plate coating.
Described resin can use any one in polyurethane (PU), polyformaldehyde (POM), polymethyl methacrylate (PMMA), Merlon (PC), polyamide (PA), ionomer, polyarylate, polyester elastomer (PEE), phenolic resin (PF)；Volatile solvent can use solvent series (MEK, THF, toluene, ECA, BCA etc.)；Curing agent can use isocyanates or melamine.
Resin as above dissolves or corrodes in weakly acidic solution, but water insoluble.When being coated with above-mentioned resin, volatile solvent and curing agent are used for making its rapid solidification, thus are stably formed the coat 240 of printing.
Described coat 240 can be formed by various polymer composites, and the 211st, described conductor wire 212 can be made up of multiple conductive materials such as electrically conductive ink or silver compound, sheet metal or sheet metals.
Weakly acidic solution includes citric acid, formic acid, acetic acid etc., of a great variety.But, make, above by conductor wire the 211st, 212 energisings, the structure that resistance value changes, the resistance change detection leak condition that can only occur according to leaking with weakly acidic solution, and it is difficult to confirm the species of the weakly acidic solution of leakage.
The present invention can confirm to occur the species of the weakly acidic solution of leakage according to time dependent resistance value.
As shown in Figure 5 a, the two ends of weakly acidic solution sensor 200 are connected with top connector 400 and terminator terminating junctor 500, described top connector 400 is connected with controller 300, and described terminator terminating junctor 500 then connects conductor wire the 211st, 212 in the termination of weakly acidic solution sensor 200.
As shown in Figure 5 b, when weakly acidic solution leaks, and when being flowed into by sensing bore 231, described coat 240 is dissolved or corrodes, and makes two conductor wires the 211st, 212 be energized and make resistance value change.
Fig. 6 is the running status chart for the controller 300 according to the resistance change situation identification weakly acidic solution species between two conductor wires the 211st, 212 is described.Described controller 300 is set with the reference resistor value of the sensor length based on weakly acidic solution sensor 200, on the basis of described reference resistor value, be set with "+" compensate (offset) value and "-" offset, to compensate the change of the self-resistance value causing because of factors such as outside temperature, humidity, electric noise, physical contacts.
Described offset can be adjusted according to the installation environment of weakly acidic solution sensor 200.
Described controller 300 be set be positioned at reference resistor value "+" alarm set value (High Limit) in direction, i.e. upper limit resistance value and the alarm set value (Low Limit) being positioned at resistance value "-" direction, i.e. lower resistance value.Can adjust sensing sensitivity by the scope regulating alarm set value.
It when weakly acidic solution occurs leakage, is gradually lowered and enters the time in range of set value by the resistance value between mensuration conductor wire the 211st, 212, identify the species of weakly acidic solution.
For example, when chemical solution A leakage, when contacting with coat 240, coat 240 dissolves or is etched, and makes resistance value change.At this moment, the time in the range of controller 300 measures the resistance value entrance alarm set value starting to change to change from resistance value, and according to the species of its minute identification weakly acidic solution.
Chemical solution B, chemical solution C are with chemical solution D compared with chemical solution A, and the resistance value time used in starting to change to enter range of set value is shorter.Described controller 300 is identified the weakly acidic solution species of leakage by measuring this kind of time.
When the increased resistance value of various chemical solutions is consistent with alarm set value (High Limit), send alarm at this positioner 300, continue the change of induced electricity resistance afterwards.A certain specified chemical solution is such as chemical solution D, and resistance value changes when making it exceed alarm set value (Low Limit), and controller 300 sends alarm in the position beyond alarm set value (Low Limit).
Various weakly acidic solution time dependent resistance value data are stored in described controller 300, therefore, can start to change to the time in the range of increased resistance value enters alarm set value by measuring from resistance value, send to should the chemical solution i.e. alarm of weakly acidic solution species of time.
In addition, weakly acidic solution of the present invention leakage sensing device can substitute described banding pattern weakly acidic solution sensor 200 with cable type sensors.As it is shown in fig. 7, the 610th, cable type sensors 600 by two strands of conductor wires 620 is separated by side by side and puts, the clad 630 being made up of the material being dissolved in weakly acidic solution outside it, can be coated.
Described clad 630, such as the coat 240 of the present invention, can be formed by coating after the mixing of 2～30 percentage by weight Graphene (graphene) dispersion liquids, 35～60 percentage by weight cation polystyrenes and 35～60 percentage by weight cation polyurethanes.
Therefore, when weakly acidic solution is contacted with described clad 630, described clad 630 dissolves, and makes resistance value change, and conductor wire the 610th, the resistance value between 620 also changes therewith.
Other principles are described above.
The 211st, described conductor wire 212 can be made up of various ways, as shown in table 1.
Table 1:
When conductor wire the 211st, 212 formed by activated carbon or carbon black or CNT (CNT) or Graphene (Graphene) when, mode of printing can be used, also can by prepare to be formed on basal film layer 210 conductor wire the 211st, 212 position sticking two-faced adhesive tape or coating adhesive formed after adhesive agent 211-1,212-1, dusting shape activated carbon or carbon black or CNT (CNT) or Graphene (Graphene) and formed, as shown in Figure 8.
That is, by conductive powder is sprinkling upon adhesive agent 211-1,212-1 upper formation conductor wire the 211st, 212.
Therefore, only could adhere to electric conductivity activated carbon or carbon black or CNT (CNT) or Graphene (Graphene) in the place being formed with adhesive agent 211-1,212-1 and form conductor wire.
Additionally, utilize spraying (suttering) method also can form conductor wire the 211st, 212.Described spraying method is to arrange to have the metal of electric conductivity and basal film layer 210 of the present invention in vacuum chamber, now, described basal film layer 210 will overlap in addition to the position of conductor wire to be formed upper protective film 213, as shown in Figure 9.
Described diaphragm 213 can be made up of synthetic resin adhesive tape.
Adding negative voltage on conducting metal, after adding positive voltage, injecting argon gas in vacuum chamber on basal film layer 210, the ion deposition at this moment spilling because ionization argon gas clashes with conducting metal is at basal film layer 210.
Depositing operation removes diaphragm 213 after terminating, just form conductor wire the 211st, 212.
Why use above-mentioned spraying method, be because when conductor wire the 211st, 212 formed by conductive materials such as electrically conductive ink, silver compound, sheet metal or sheet metals when, its thickness is 5～10, there is bigger resistance value, if being coated coat 240 at an upper portion thereof, then conductor wire the 211st, 212 and the thickness of coat 240 will reach 30～50, additionally, being affected by conductor wire the 211st, 212 thickness, coat 240 is difficult to be stably adhered on basal film layer 210.
But, if use spraying method, conductor wire the 211st, 212 thickness be only 0.1～1, thickness diminishes, thus coat 240 can be made to be stably adhered on basal film layer 240.
In addition, conductor wire the 211st, 212 not necessarily two, can only form, the above of basal film layer 210, the conductor wire being made up of activated carbon or carbon black or CNT (CNT) or Graphene (Graphene), and the two ends by one conductor wire are connected to controller by conductive cable.
Claims (11)
1. a weakly acidic solution leakage sensing device, it is characterized in that: conductor wire that it by the basal film layer of film material, forms along its length at the upper surface of described basal film layer and for covering described conductor wire and can dissolve or the coat that corrodes in weakly acidic solution is constituted, described coat is mixed by 2～30 percentage by weight graphene dispersing solutions, 35～60 percentage by weight cation polystyrenes and 35～60 percentage by weight cation polyurethane phases and is coated and forms.
2. a weakly acidic solution leakage sensing device, it is characterized in that: conductor wire that it by the basal film layer of film material, forms along its length at the upper surface of described basal film layer and for covering described conductor wire and can dissolve or the coat that corrodes in weakly acidic solution is constituted, the mixture that described coat is dissolved or corroded by 50～98 percentage by weights the resin material in weak acid, 1～50 percentage by weight volatile solvent and 1～10 percentage by weight curing agent is formed.
3. weakly acidic solution according to claim 2 leakage sensing device, it is characterised in that: described resin material is made up of any one in polyurethane (PU), polyformaldehyde (POM), polymethyl methacrylate (PMMA), Merlon (PC), polyamide (PA), ionomer, polyarylate, polyester elastomer (PEE), phenolic resin (PF) or polymer composite.
4. weakly acidic solution according to claim 2 leakage sensing device, it is characterised in that: described volatile solvent is solvent series solvent.
5. weakly acidic solution according to claim 2 leakage sensing device, it is characterised in that: described curing agent is isocyanates or melamine.
6. a weakly acidic solution leakage sensing device, it is characterized in that: the conductor wire that by the basal film layer of film material, formed along its length at the upper surface of described basal film layer and for covering described conductor wire and can dissolve or the coat that corrodes in weakly acidic solution constitutes weakly acidic solution sensor, being connected with controller on described weakly acidic solution sensor, described controller is for generating alarm according to the resistance value changing in time while conductor wire supplies remote sensing power supply.
7. a weakly acidic solution leakage sensing device, it is characterized in that: by the conductor wire being separated by side by side be coated on the clad outside described conductor wire with the material dissolved or corrode in weakly acidic solution and constituted weakly acidic solution sensor, being connected with controller on described weakly acidic solution sensor, described controller is for generating alarm according to the resistance value changing in time while described conductor wire supplies remote sensing power supply.
8. the weakly acidic solution leakage sensing device according to claim 6 or 7, it is characterized in that: in described controller, be set with the reference resistor value of described weakly acidic solution sensor, described reference resistor value "+" direction and "-" direction setting have upper limit resistance value and the lower resistance value of alarm set value.
9. the weakly acidic solution leakage sensing device according to according to any one of claim 1 or 2 or 6, it is characterized in that: described conductor wire is made up of the first conductor wire and second conductor wire of pair of parellel, described first conductor wire is made up of activated carbon or carbon black or CNT or Graphene compound or silver compound or sheet metal or other electric conductors, and described second conductor wire is by activated carbon or carbon black or CNT or Graphene compound.
10. the weakly acidic solution leakage sensing device according to according to any one of claim 1 or 2 or 6, it is characterised in that: described conductor wire is by the upper surface formation adhesive agent at basal film layer, and sprays conductive powder on described adhesive agent and formed.
11. weakly acidic solution leakage sensing devices according to according to any one of claim 1 or 2 or 6, it is characterised in that: described conductor wire is formed by spraying coating process.
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| CN201510041896.2A CN105988138A (en) | 2015-01-28 | 2015-01-28 | Faintly acid solution leakage sensing device |
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| CN201510041896.2A CN105988138A (en) | 2015-01-28 | 2015-01-28 | Faintly acid solution leakage sensing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764247A (en) * | 2019-03-28 | 2019-05-17 | 合肥鑫晟光电科技有限公司 | A kind of liquid leak detection device |
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|---|---|---|---|---|
| US20070275296A1 (en) * | 2004-02-26 | 2007-11-29 | Origin Electric Company, Limited | Acid Liquid Leakage Sensor |
| US20100221841A1 (en) * | 2006-03-03 | 2010-09-02 | Tetsuya Osaka | Semiconductor dna sensing device and dna sensing method |
| KR20110053704A (en) * | 2009-11-16 | 2011-05-24 | (주)유민에쓰티 | Pipe leak/burst sensing apparatus |
| CN103543146A (en) * | 2013-09-12 | 2014-01-29 | 安徽理工大学 | Electronic tag combining time-temperature indicator and radio frequency identification |
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2015
- 2015-01-28 CN CN201510041896.2A patent/CN105988138A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070275296A1 (en) * | 2004-02-26 | 2007-11-29 | Origin Electric Company, Limited | Acid Liquid Leakage Sensor |
| US20100221841A1 (en) * | 2006-03-03 | 2010-09-02 | Tetsuya Osaka | Semiconductor dna sensing device and dna sensing method |
| KR20110053704A (en) * | 2009-11-16 | 2011-05-24 | (주)유민에쓰티 | Pipe leak/burst sensing apparatus |
| CN103543146A (en) * | 2013-09-12 | 2014-01-29 | 安徽理工大学 | Electronic tag combining time-temperature indicator and radio frequency identification |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109764247A (en) * | 2019-03-28 | 2019-05-17 | 合肥鑫晟光电科技有限公司 | A kind of liquid leak detection device |
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